#include <stdio.h>

void swapNumber(int *a, int *b);

main()
{
	int x = 5, y = 3;
	printf("x = %p, y = %p\n", &x, &y);
	swapNumber(&x, &y);
	printf("x = %d, y = %d\n", &x, &y);
}

void swapNumber(int *a, int *b)
{
	int *temp;
	temp = a;
	a = b;
	b = temp;
}